Re: [topicmaps-comment] Occurrences of associations?

[Richard Light <richard@light.demon.co.uk>]

In message <E907B9F5-3894-48EE-AB3E-13158BCC7A4B@garshol.priv.no>, Lars 
Marius Garshol <larsga@garshol.priv.no> writes
>
>Hi Richard and Roger,
>
>This list is not much used any more. You may find TOPICMAPMAIL at 
>InfoLoom more active.

Thanks: I have already signed up for this list, thanks to a mail from 
Michel Biezunski.

>This is reification, and in XTM 1.0 you do it as follows:
>
>  <association id="myassoc">
>    ...
>  </association>
>
>  <topic id="assoctopic">
>    <subjectIdentity>
>      <subjectIndicatorRef xlink:href="#myassoc"/>
>    ...

I see that in the XTM 2.0 draft, Associations no longer have an id 
attribute. However, they have a new reifier attribute, which is meant to 
point to the reifying topic.

Does this mean that the "reified construct - reifier" link works in the 
opposite direction in XTM 2.0?  Is it encoded something like this:

   <association reifier="#assoctopic">
     <itemIdentity href="myassoc"/>
     ...
   </association>

   <topic id="assoctopic">
     <subjectIdentifier href="#myassoc"/>
     ...
   </topic>

?

If so, what is the relationship between <subjectIdentifier> in XTM 2.0 
(which I assume takes the place of <subjectIdentity> in your code above) 
and this reverse link?  Can either be inferred from the presence of the 
other, or are their semantics different?

Richard
-- 
Richard Light
SGML/XML and Museum Information Consultancy
richard@light.demon.co.uk